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Finding the Fourth Proportional to 739.12, 1,108.82 and 252.24

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Solution

The fourth proportional to 739.12, 1,108.82 and 252.24 is: 378.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.12 : 1,108.82 = 252.24 : x
  2. Step 2: Convert to fraction form
    739.12/1,108.82 = 252.24/x
  3. Step 3: Cross multiply
    739.12x = 1,108.82 × 252.24
  4. Step 4: Simplify right side
    739.12x = 279,688.76
  5. Step 5: Solve for x
    x = 279,688.76/739.12
  6. Step 6: Final answer
    x = 378.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.